I need a step in front of an 8 foot sliding glass door. The step is 11 feet long. I threw a 2x12 in place for the winter and it is proving to be too narrow. For some reason there is a tendency for people to step right on the edge or partially miss it. Also, the 2x12 is already starting to warp. I don't know where to get a single piece of lumber 14 inches wide and if I went that route I'm afraid it would warp. I need suggestions for something to make a single piece 11 feet long, 14 inch wide step out of of.